Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e048e3003524ad5…

MALICIOUS

PDF

73.1 KB Created: 2021-07-07 18:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ffba0446363047b5a48645f181a6b86 SHA-1: 438e70af54570670a0376bc171171b5a5391d82c SHA-256: 9e048e3003524ad51f2c8b492cc667964fb78a2834e22bda986ad94036bf7b2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fg8mt7ehp43s7ff03n61qaq3k4/silope.pdf
    • http://hzbmsj.net/images/upload/File/19589564729.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a565a6c33---36913890458.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/21f08a8ce04452098bbc571d22e0c2b9/garalanononogukujusasonej.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fc26d677a---50967829315.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b71765e27---razesepagovodijal.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0e54d968---93315417451.pdf
    • https://ancoraeducacion.com/images/pinovelarafofemabivol.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa10a985f2---35126252398.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ced93a4cf---90896056152.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/66707865bf152a8becdc19289b55beda/12215865616.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf34217205---44277565632.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075739027cd0---24062827388.pdf
    • http://domeinbeverdonk.be/assets/files/file/31875027391.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/39ef078e165f72e7a2d47d2a3c02b983/78960013576.pdf
    • http://allasclub.com/campannas/file/jugikok.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/21e871325cec4968c07a97877a549e5f/5208254596.pdf
    • http://songiadahoaian.com/upload/ck/files/lupagazi.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/91307e179a5263643280bb06d1872241/xidegodos.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af15d884d7b---luwolivoz.pdf
    • http://hurtmar.pl/Upload/file/xinoxuledup.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/57cba56acfc7269c240de9ea6d80d3fc/63585605443.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afe695526f---95066725755.pdf
    • https://aljuboori.com/userfiles/files/biripozasafori.pdf
    • http://abimobiliare.pl/pliki/File/webamuvafevulaxuvujowiw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=android+allow+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdd5.bin
958605670ebb4ed6ddd5ca0abc6ce4f7cf6e1b7b1f1171186659888db1943825		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD5 16308 bytes
font_01_sfnt_off0000e8a6.bin
f49e8de3460186c77fefa3d54181e3ba0a0f94dffc028283e94f1df5615da5f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 10144 bytes
font_02_sfnt_off0000ff64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 16792 bytes

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